CVE-2015-6997

Name: CVE-2015-6997
Creator: NVD / NIST
Published: 2015-10-23T10:59:07.32+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.90%

Last modified Jun 17, 2026

CVE-2015-6997 is a vulnerability of currently unknown severity. The X.509 certificate-trust implementation in Apple iOS before 9.1 does not recognize that the kSecRevocationRequirePositiveResponse flag implies a revocation-checking requirement, which makes it easier for man-in-the-middle attackers to spoof endpoints by leveraging access to a revoked certificate.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

The X.509 certificate-trust implementation in Apple iOS before 9.1 does not recognize that the kSecRevocationRequirePositiveResponse flag implies a revocation-checking requirement, which makes it easier for man-in-the-middle attackers to spoof endpoints by leveraging access to a revoked certificate.

Metrics

EPSS Probability

0.90%

55.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-254

Affected Software

Vendor	Product	Versions
Apple	Iphone Os	<= 9.0.2
Apple	Watchos	<= 2.0

References

http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.htmlVendor Advisory
http://lists.apple.com/archives/security-announce/2015/Oct/msg00002.htmlVendor Advisory
http://www.securityfocus.com/bid/77268
http://www.securitytracker.com/id/1033929
https://support.apple.com/HT205370Vendor Advisory
https://support.apple.com/HT205641Vendor Advisory
http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.htmlVendor Advisory
http://lists.apple.com/archives/security-announce/2015/Oct/msg00002.htmlVendor Advisory
http://www.securityfocus.com/bid/77268
http://www.securitytracker.com/id/1033929
https://support.apple.com/HT205370Vendor Advisory
https://support.apple.com/HT205641Vendor Advisory

Timeline

Published: Oct 23, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-6997?

How severe is CVE-2015-6997?

Severity scoring for CVE-2015-6997 is pending analysis. The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2015-6997?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-6997?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST